Abstract：In this paper,by using DEA approach with double frontiers,the evaluation units were divided into“optimal”and“worst”,China’s high-tech industries optimistic and pessimistic efficiency were measured and the comprehensive results were expressed by the geometric average efficiency.According to the analysing results,Chinese high-tech industries’ R&D efficiency was low.Besides,the R&D gap between 22 subdivision industries was large.The study suggested that while maintaining the investment,Chinese high-tech industry industries should focus on improving the ability to transform scientific and technological achievements.
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